Pitchaiah, P. S. (1991). Water ecology pollution and management. Chugh Publications.
Lua i Stíl Chicago (17ú heag.)Pitchaiah, P. Sankara. Water Ecology Pollution and Management. Allahabad: Chugh Publications, 1991.
Lua MLA (9ú heag.)Pitchaiah, P. Sankara. Water Ecology Pollution and Management. Chugh Publications, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.